SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Gain on Recovery of Insurance Proceeds (Details) $ in Thousands	12 Months Ended
	Dec. 25, 2024 USD ($) restaurant	Dec. 27, 2023 USD ($) restaurant	Dec. 28, 2022 USD ($) restaurant
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Gain on recovery of insurance proceeds		$ 327
Gain on recovery of insurance proceeds, property, equipment and expenses	$ 41	247
Received from the insurance		$ 500
Restaurants sold | restaurant	1	18
Proceeds from disposition of restaurants	$ 100	$ 7,722	$ 1,002
Loss (gain) on disposition of restaurants	7	$ (5,034)	$ (848)
Maximum
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Gain on recovery of insurance proceeds, property, equipment and expenses	100
Loss (gain) on disposition of restaurants	$ 100
Orange County | Restaurant Sales
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Number Of Restaurants, Sold To Third Party | restaurant			3
Orange County | Restaurant Sales | Disposed of by Sale, Not Discontinued Operations
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Proceeds from disposition of restaurants			$ 1,000
Loss (gain) on disposition of restaurants			$ (800)
Fire
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Number of Restaurants | restaurant		2	2
Fire | Maximum
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Incurred costs		$ 100